Rashi citing Targum Yonasan: Even the officers rejoiced [over your downfall]. Radak - It says "Nachah Shaktah Kol ha'Aretz" (7), i.e. the commoners, who were pained due to his subjugation. Even the king and nobles, who did not need to work for him, rejoiced over the demise of his regime.

Radak: The great people were compared to pine and cedar trees. Therefore, it discusses one who cuts. From when Nebuchadnetzar died, even though Nochrim served his son and grandson, the latter did not pain them. Nebuchadnetzar killed and incarcerated them, and imposed harsh labor on them.

Malbim: The pine and cedar trees rejoiced, for Melech Bavel used to cut forests to build ramparts. There is now a general Simchah in the entire world.